Loader Bobcat 773. Manual - part 98

CRANKSHAFT AND BEARINGS (Cont’d)

Servicing The Crankshaft And Bearings (Cont’d)

Remove the front bearing (Item 1) [A] with the special
removal tool.

Installation:  Clean the new bearing and bore, apply oil
on them. Install the new bearing with the installation driver
tool [A].

Clean the crankshaft journal and bearing. Put a strip of
press gauge on the center journal.

Install the main bearing case halves and tighten the bolts.
Remove the bearing case halves.

Measure the flattened press gauge [B].

If the clearance exceeds the allowable limit, replace the
crankshaft bearing.

Crankshaft Journal
  O.D.

2.044–2.045 inches (51,92–51,94 mm)

. . . . . . . . 

Bearing I.D.

2.046–2.048 inches (51,98–52,03 mm)

. . 

Oil Clearance

0.002–0.004 inch (0,04–0,10 mm)

. . . . . . 

Allowable Limit

0.008 inch (0,2 mm)

. . . . . . . . . . . . . . . . . 

A

PI–10024

0.165–0.177’’

(4,2–4,5 mm)

1

773 BICS Loader

–7–71–

Service Manual

B

PI–10025

CYLINDER BORE

Checking The Cylinder Bore

Use a gauge to check the inside measurement of the
cylinder bore [A].

Measure the six points as shown in figure [B] to find the
maximum wear.

The specification is 3.425–3.426 inches (87,0–87,02
mm). The wear limit is +0.006 inch (+0,15 mm).

If the cylinder bore is not within specifications, re–bore the
cylinder for oversize piston.

A

B–04066

–7–72–

773 BICS Loader

Service Manual

B

A–02717

WATER PUMP

Disassembly And Assembly

Remove the water pump from the timing gearcase cover
[A].

Put the water pump in a vise and remove the nut [B].

Remove the pulley using a puller. Remove the key and
snap ring.

Drive the shaft out of the impeller side of the water pump
housing [C].

Install the new seals [D]. Install the shaft.

Installation: Put the water pump in a vise and tighten the
nut to 50–57 ft.–lbs. (68–77 Nm) torque. Always use a
new gasket when installing the water pump on the timing
gearcase cover.

A

B–05318

C

B–05325

D

A–02783

773 BICS Loader

–7–73–

Service Manual

B

B–05324

SYSTEMS
ANALYSIS

773 BICS Loader

–8–1–

Service Manual

SYSTEMS ANALYSIS

BOBCAT INTERLOCK CONTROL SYSTEM (BICS

™

)

  (S/N 509648900 & Above

)

 (S/N 509617300 & Avove)

Additional Inspection For Loaders With Advanced Hand Controls

8–3

. . . . 

Inspecting Deactivation Of The Auxiliary Hydraulics System
  (Engine STOPPED – Key ON)

8–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspecting The Bics

™

 System Controller

  (Engine STOPPED – Key ON)

8–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspecting The Seat Bar Sensors (Engine Running)

8–3

. . . . . . . . . . . . . . . 

Inspecting The Traction Lock (Engine Running)

8–3

. . . . . . . . . . . . . . . . . . . 

Inspecting The Lift Arm By–Pass Control

8–3

. . . . . . . . . . . . . . . . . . . . . . . . . 

Additional Inspection For Loaders

8–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Troubleshooting Chart

8–4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

BOBCAT INTERLOCK CONTROL SYSTEM (BICS

™

)

  (S/N 509648899 & Below

)

 (S/N 509617299 & Below)

Inspecting The Deactivation Of The Auxiliary Hydraulics System
  (Engine STOPPED – Key ON)

8–5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspecting The Bics

™

 System Controller

  (Engine STOPPED – Key ON)

8–5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspecting The Seat And Seat Bar Sensors (Engine Running)

8–5

. . . . . . . 

Inspecting The Traction Lock (Engine Running)

8–5

. . . . . . . . . . . . . . . . . . . 

Inspecting The Lift Arm By–Pass Control

8–5

. . . . . . . . . . . . . . . . . . . . . . . . . 

Maintenance

8–6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Troubleshooting Chart

8–7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

BOBCAT INTERLOCK CONTROL SYSTEM (BICS

™

)

Troubleshooting Guide

BICS Controller

8–8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Seat Bar Sensor

8–11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Seat Sensor

8–10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Traction Lock

8–9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

BICS

™

 SYSTEM CONTROLLER

Removal And Installation

8–15

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

ELECTRICAL/HYDRAULIC CONTROLS REFERENCE

Controls Identification Chart

8–28

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

SEAT BAR SENSOR

BICS

™

 Controller Seat Sensor Circuit Test

8–18

. . . . . . . . . . . . . . . . . . . . . . . 

Removal And Installation

8–17

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Seat Bar Sensor Test

8–16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

SEAT SENSOR

BICS

™

 Controller Seat Sensor Circuit Test

8–14

. . . . . . . . . . . . . . . . . . . . . . . 

Removal And Installation

8–13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Seat Sensor Test

8–12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

TRACTION LOCK

Removal And Installation

8–19

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Page

Number

BOBCAT INTERLOCK CONTROL SYSTEM (BICS

™

)

Continued On Next Page

Revised Jan. 99